I have 4 distorted rhythm guitar tracks (two 100% left and right and two 60% left and right), and two clean guitar tracks (both 100% to left and right).

For reverb, I use a plugin called epicVerb, it has both tight small room reverb and ambience effect. I never use the ambience effect, I use the small room reverb and change the settings as needed, here's a screenshot of my settings:

And here is my Bass equalization screenshot, sorry I don't know much about EQing bass guitars

So are you saying that I need to boost some frequencies around 250 to 300Hz?

Or I can put a compressor on the bass to make the volumes equal to some extent?

Watching the spectrum of Your song I would rather say You need to cut a lot below 100hZ. Your bass boost causes some unpleasant "boom". Maybe You don't hear this on Your speakers but it is annoying. I would tun off the boost You showed on the screen and add some bass volume to make it glued to the guitars somewhere in the 200 Hz range

Messing with a lowest frequencies demands 100% trust to Your monitoring system or often more trust to the freq analyzer. Last time I made a mix I decided to trust 100% to the analyzer and guess what? When I was testing on the different gear the bass was always there but never made the mix "boomy" even though that on some speakers You would like have a bit more of it...but...that's the prize. It's 30% of the job to make Your mix sound good on only one set of speakers....very sa but true

IMPORTANT NOTE!!!!!!!!

Don't add nothing below 40 Hz! Not much speakers can produce that low freq...if You haven't got something like 15 to 18" woofer

Most of home speakers are not trust worth under 80 to 100 Hz. If You take a close look at the spec of many home speakers You will see that even if they write "40 to 20 Hz" frequency response it is usually like -7 to -10 dB on the 40 Hz...and even more! So when You will set those freq on Your monitor system at the level You like...someone with bigger speakers will have 10dB TOO MUCH of those and this is more than a lot Even in the bass or bass drum we usually cut (matter of preferences) under 40, 30 or 20 Hz because those freqs are "mudding" You speaer and the cone is not working properly (I have no idea how to name it in English)

My dear friend...Tell me does it all sound like a mono mix? Something is wrong while doing mixdown? Reverb sounds like it was stereo but guitars still sound like their mono in the center. Maybe something wrong with the mixdown options?

P.s I've got a proposition. Let's make a special thread in my section to work on You mixing skills with this song. It's topic that needs more time and more posts

My dear friend...Tell me does it all sound like a mono mix? Something is wrong while doing mixdown? Reverb sounds like it was stereo but guitars still sound like their mono in the center. Maybe something wrong with the mixdown options?

P.s I've got a proposition. Let's make a special thread in my section to work on You mixing skills with this song. It's topic that needs more time and more posts

I have almost zero experience in production I have no idea why it sounds mono, maybe I should record the takes again? Or is it just a problem of mixing?

Yeah we can do that, if you think that's best I'm down with anything

Oh! Another thing came in my mind! I'm using keFIR mono, should I use Polin Lecab or keFIR stereo to load my impulse response?